{"id":3450,"date":"2026-05-13T09:00:00","date_gmt":"2026-05-13T01:00:00","guid":{"rendered":"https:\/\/eqsvq3fzct.wpdns.site\/blog\/lcd-display-mccb-in-modern-electrical-systems\/"},"modified":"2026-10-20T10:58:35","modified_gmt":"2026-10-20T02:58:35","slug":"lcd-display-mccb-in-modern-electrical-systems","status":"publish","type":"post","link":"https:\/\/w9-group.com\/fa\/blog\/lcd-display-mccb-in-modern-electrical-systems\/","title":{"rendered":"\u062f\u0631\u06a9 \u0646\u0642\u0634 Lcd Display Mccb \u062f\u0631 \u0633\u06cc\u0633\u062a\u0645\u200c\u0647\u0627\u06cc \u0627\u0644\u06a9\u062a\u0631\u06cc\u06a9\u06cc \u0645\u062f\u0631\u0646"},"content":{"rendered":"

An LCD display on an MCCB can make settings and events easier to read, but a screen is only one part of a protection system. A project engineer still has to verify the sensing method, trip functions, auxiliary supply, communication interface and commissioning process. <\/p>\n

Quick answer: separate what the display shows from what the breaker protects and from what a communication interface transmits. Confirm the exact model manual, rated duty, adjustable ranges, event memory, alarm outputs, protocol and loss-of-power behavior. IEC 60947-2:2024 provides a circuit-breaker product scope; it does not turn a display feature into an installation design or a product certification claim.<\/p>\n

\"\u062f\u0631\u06a9<\/figure>\n

LCD MCCB Display Functions<\/h2>\n

A display may expose measured current, setting values, trip status or event information, depending on the model. Treat every displayed value as a model-specific feature: request accuracy, update behavior, units and the conditions under which the reading is valid. Do not infer power quality, remote control or data logging from the presence of an LCD. See \u0631\u0634\u062a\u0647 \u0645\u062d\u0635\u0648\u0644\u0627\u062a MCCB<\/a> \u0628\u0631\u0627\u06cc \u0645\u062d\u0635\u0648\u0644 \u06cc\u0627 \u0631\u0627\u0647\u0646\u0645\u0627\u06cc\u06cc \u0645\u0631\u0628\u0648\u0637\u0647.<\/p>\n

\"\u062f\u0631\u06a9<\/figure>\n

Protection functions remain the priority<\/h2>\n

The breaker still needs the correct long-time, short-time, instantaneous and ground-fault functions for the circuit duty. Settings must be coordinated with conductor capacity, upstream devices and the \u0645\u0648\u062c \u0628\u0631\u0642 \u0628\u0627\u0644\u0642\u0648\u0647<\/strong>. A readable screen cannot compensate for an incorrect pickup, delay or breaking-capacity selection. Record the final settings and the person who approved them. See MCCB selection guidance for the relevant product or guidance.<\/p>\n

\"\u062f\u0631\u06a9<\/figure>\n
\"WLM8-250H-3300,amp<\/figure>\n

Display and Remote Monitoring Functions<\/h2>\n

An LCD can be local indication. A communication interface can expose data to a gateway or building system. A remote-control accessory may perform a switching action. These functions can coexist, but they must not be assumed to be included together. Confirm terminals, protocol, auxiliary supply, isolation and fail-state behavior in the exact product documentation. See LCD MCCB with Modbus documentation<\/a> \u0628\u0631\u0627\u06cc \u0645\u062d\u0635\u0648\u0644 \u06cc\u0627 \u0631\u0627\u0647\u0646\u0645\u0627\u06cc\u06cc \u0645\u0631\u0628\u0648\u0637\u0647.<\/p>\n

\"\u06f1\u06f0<\/figure>\n

Compare local and remote functions<\/h2>\n
\n\n\n\n\n\n\n\n\n
\u0639\u0645\u0644\u06a9\u0631\u062f<\/th>\nModel evidence<\/th>\nDistinction<\/th>\n<\/tr>\n<\/thead>\n
Local display<\/td>\nValues, units and accuracy<\/td>\nNot automatic remote access<\/td>\n<\/tr>\n
Monitoring link<\/td>\nProtocol and registers<\/td>\nNot automatic switching authority<\/td>\n<\/tr>\n
Remote operation<\/td>\nCompatible accessory and supported commands<\/td>\nRequires safe control logic<\/td>\n<\/tr>\n
\u062d\u0641\u0627\u0638\u062a<\/td>\nExact release functions and curves<\/td>\nNot established by the screen<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\"\u0628\u0631\u0631\u0633\u06cc<\/figure>\n

What an operator can infer from an LCD<\/h2>\n

A readable current value helps an operator identify loading, but only within the model’s declared measurement conditions. It does not prove power-quality analysis, revenue-grade energy measurement or predictive maintenance. Ask which variables are displayed and what happens when auxiliary power is lost.<\/p>\n

For the published WLM6EY-250 example, W9 lists an LCD and Modbus RS485 on a 250 A frame with 3P\/4P options. The communication register map, supported commands and trip-function list still need order-specific confirmation. A screen and a bus connection do not automatically provide remote closing.<\/p>\n

\"Top<\/figure>\n
\"\u062f\u0631\u06a9<\/figure>\n

Standards and commissioning evidence<\/h2>\n

IEC 60947-2:2024 applies within its published circuit-breaker scope, including circuits up to 1,000 V AC or 1,500 V DC. IEC 60364-4-43:2023 addresses installation \u062d\u0641\u0627\u0638\u062a \u062f\u0631 \u0628\u0631\u0627\u0628\u0631 \u062c\u0631\u06cc\u0627\u0646 \u0628\u06cc\u0634 \u0627\u0632 \u062d\u062f<\/strong> and coordination. Keep product evidence separate from assembly and installation evidence. During commissioning, compare the physical label, approved settings, test result, communication address and as-built schedule.<\/p>\n

\"How<\/figure>\n

LCD MCCB Selection Checklist<\/h2>\n

Specify current and voltage ratings, poles, trip functions, adjustable ranges, display variables, alarm contacts, protocol, auxiliary power, enclosure conditions, replacement procedure and document language. For a W9 model, confirm the exact series and \u0631\u062a\u0628\u0647 \u0641\u0639\u0644\u06cc<\/strong> on the product page rather than generalizing from the family name. See contact W9 for model documentation for the relevant product or guidance.<\/p>\n

\"\u0622\u06cc\u0646\u062f\u0647<\/figure>\n

LCD MCCB Selection Records<\/h2>\n

\u062f\u0631 \u0645\u0631\u062d\u0644\u0647 \u0637\u0631\u0627\u062d\u06cc\u060c \u0642\u0628\u0644 \u0627\u0632 \u0627\u0646\u062a\u062e\u0627\u0628 \u0634\u0645\u0627\u0631\u0647\u0654 \u06a9\u0627\u062a\u0627\u0644\u0648\u06af\u060c \u0648\u0638\u0627\u06cc\u0641 \u0627\u0644\u06a9\u062a\u0631\u06cc\u06a9\u06cc \u0648 \u0641\u0631\u0636\u06cc\u0627\u062a \u0646\u0627\u0645\u0634\u062e\u0635 \u0631\u0627 \u0628\u0646\u0648\u06cc\u0633\u06cc\u062f. \u0648\u0644\u062a\u0627\u0698\u060c \u0641\u0631\u06a9\u0627\u0646\u0633\u060c \u062c\u0631\u06cc\u0627\u0646 \u0645\u0633\u062a\u0645\u0631\u060c \u0642\u0637\u0628\u200c\u0647\u0627 \u0648 \u067e\u06cc\u0634\u200c\u0628\u06cc\u0646\u06cc\u200c\u0647\u0627\u06cc \u0633\u06cc\u0633\u062a\u0645 \u0631\u0627 \u0645\u0634\u062e\u0635 \u06a9\u0646\u06cc\u062f. \u0636\u0631\u06cc\u0628 \u062e\u0637\u0627<\/strong>, \u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0627\u06cc\u0646 \u0631\u0648\u0634\u060c \u0645\u0634\u062e\u0635\u0627\u062a \u0628\u0627\u0631\u060c \u0634\u0631\u0627\u06cc\u0637 \u0645\u062d\u06cc\u0637\u06cc \u0648 \u0645\u062d\u0641\u0638\u0647 \u0628\u0627\u0631\u06af\u0630\u0627\u0631\u06cc \u0645\u06cc\u0634\u0648\u0646\u062f. \u0627\u06cc\u0646 \u0627\u0645\u0631 \u06cc\u06a9 \u067e\u0627\u06cc\u0647 \u0645\u0634\u062a\u0631\u06a9 \u0628\u0631\u0627\u06cc \u0647\u0631 \u067e\u06cc\u0634\u0646\u0647\u0627\u062f \u0642\u06cc\u0645\u062a \u0627\u06cc\u062c\u0627\u062f \u0645\u06cc\u200c\u06a9\u0646\u062f \u0648 \u0645\u0627\u0646\u0639 \u0645\u06cc\u200c\u0634\u0648\u062f \u062a\u0627 \u06cc\u06a9 \u062a\u0627\u0645\u06cc\u0646\u06a9\u0646\u0646\u062f\u0647 \u0628\u0627 \u06cc\u06a9 \u067e\u06cc\u06a9\u0631\u0628\u0646\u062f\u06cc \u0645\u062a\u0641\u0627\u0648\u062a \u0628\u0647 \u06cc\u06a9 \u0633\u0648\u0627\u0644 \u0645\u062a\u0641\u0627\u0648\u062a \u067e\u0627\u0633\u062e \u062f\u0647\u062f.<\/p>\n

\u062f\u0631 \u0645\u0631\u062d\u0644\u0647 \u0627\u0631\u0627\u0626\u0647 \u067e\u06cc\u0634\u0646\u0647\u0627\u062f\u060c \u062f\u0631\u062e\u0648\u0627\u0633\u062a \u06a9\u0646\u06cc\u062f \u06a9\u0647 \u06cc\u06a9 \u062f\u0641\u062a\u0631\u0686\u0647 \u0627\u0637\u0644\u0627\u0639\u0627\u062a \u06a9\u0646\u062a\u0631\u0644 \u0634\u062f\u0647\u060c \u06a9\u062f \u0645\u062f\u0644\u060c \u0646\u0642\u0634\u0647 \u06a9\u0644\u06cc\u060c \u062a\u0631\u062a\u06cc\u0628 \u062a\u0631\u0645\u06cc\u0646\u0627\u0644\u060c \u062c\u062f\u0648\u0644 \u0644\u0648\u0627\u0632\u0645 \u062c\u0627\u0646\u0628\u06cc\u060c \u0645\u062d\u062f\u0648\u062f\u0647 \u062a\u0646\u0638\u06cc\u0645\u060c \u0645\u062d\u062f\u0648\u062f\u0647 \u062a\u0633\u062a \u0648 \u0646\u0633\u062e\u0647 \u0646\u0647\u0627\u06cc\u06cc \u0633\u0646\u062f \u0627\u0631\u0627\u0626\u0647 \u0634\u0648\u062f. \u0645\u0642\u0627\u06cc\u0633\u0647 \u06a9\u0646\u06cc\u062f: \u06cc\u06a9 \u062f\u0633\u062a\u06af\u0627\u0647 \u062b\u0627\u0628\u062a\u060c \u06cc\u06a9 \u062f\u0633\u062a\u06af\u0627\u0647 \u0642\u0627\u0628\u0644 \u0628\u0631\u062f\u0627\u0634\u062a\u0647 \u0634\u062f\u0646 \u0648 \u06cc\u06a9 \u062f\u0633\u062a\u06af\u0627\u0647 \u0628\u0627 \u0642\u0627\u0628\u0644\u06cc\u062a \u0627\u0631\u062a\u0628\u0627\u0637\u06cc\u060c \u062d\u062a\u06cc \u062f\u0631 \u0635\u0648\u0631\u062a\u06cc \u06a9\u0647 \u062c\u0631\u06cc\u0627\u0646 \u0645\u062a\u0635\u0644 \u0628\u0647 \u0622\u0646 \u0645\u0634\u0627\u0628\u0647 \u0628\u0627\u0634\u062f\u060c \u0645\u062d\u062f\u0648\u062f\u0647\u200c\u0647\u0627\u06cc \u0645\u062e\u062a\u0644\u0641\u06cc \u062f\u0627\u0631\u0646\u062f. \u062b\u0628\u062a \u06a9\u0646\u06cc\u062f \u06a9\u0647 \u0686\u0647 \u0686\u06cc\u0632\u06cc \u0634\u0627\u0645\u0644 \u0622\u0646 \u0634\u062f\u0647\u060c \u0686\u0647 \u0686\u06cc\u0632\u06cc \u0627\u062e\u062a\u06cc\u0627\u0631\u06cc \u0627\u0633\u062a \u0648 \u0686\u0647 \u0686\u06cc\u0632\u06cc \u0628\u0627\u06cc\u062f \u062a\u0648\u0633\u0637 \u0633\u0627\u0632\u0646\u062f\u0647 \u067e\u0646\u0644 \u0627\u0631\u0627\u0626\u0647 \u0634\u0648\u062f.<\/p>\n

\u062f\u0631 \u0645\u0631\u062d\u0644\u0647 \u0645\u0648\u0646\u062a\u0627\u0698 \u0648 \u0631\u0627\u0647\u0627\u0646\u062f\u0627\u0632\u06cc\u060c \u0647\u0648\u06cc\u062a \u0641\u06cc\u0632\u06cc\u06a9\u06cc\u060c \u0646\u0635\u0628\u060c \u0633\u06cc\u0645 \u06a9\u0634\u06cc\u060c \u0628\u0631\u0686\u0633\u0628\u200c\u0647\u0627\u060c \u06af\u0634\u062a\u0627\u0648\u0631\u060c \u062a\u0646\u0638\u06cc\u0645\u0627\u062a \u0648 \u0628\u0631\u0631\u0633\u06cc\u200c\u0647\u0627\u06cc \u0639\u0645\u0644\u06a9\u0631\u062f\u06cc \u0631\u0627 \u0628\u0627 \u067e\u0631\u0648\u0646\u062f\u0647 \u062a\u0623\u06cc\u06cc\u062f\u0634\u062f\u0647 \u062a\u0623\u06cc\u06cc\u062f \u06a9\u0646\u06cc\u062f. \u062f\u0631 \u0635\u0648\u0631\u062a\u06cc \u06a9\u0647 \u06a9\u0627\u0631\u0628\u0631\u062f \u0627\u0632 \u0645\u062d\u062f\u0648\u062f\u0647 \u0645\u062d\u0635\u0648\u0644 \u0645\u0646\u062a\u0634\u0631 \u0634\u062f\u0647 \u062e\u0627\u0631\u062c \u0628\u0627\u0634\u062f\u060c \u0627\u0646\u062a\u0634\u0627\u0631 \u0631\u0627 \u0645\u062a\u0648\u0642\u0641 \u06a9\u0646\u06cc\u062f \u0648 \u062a\u0648\u0636\u06cc\u062d\u0627\u062a \u0641\u0646\u06cc \u0631\u0627 \u062f\u0631\u062e\u0648\u0627\u0633\u062a \u06a9\u0646\u06cc\u062f. \u0627\u06cc\u0646 \u0645\u062f\u0627\u0631\u06a9\u060c \u0628\u0647 \u062f\u0644\u06cc\u0644 \u0627\u06cc\u0646\u06a9\u0647 \u0628\u0647 \u0645\u0647\u0646\u062f\u0633 \u0628\u0639\u062f\u06cc \u0627\u06cc\u0646 \u0627\u0645\u06a9\u0627\u0646 \u0631\u0627 \u0645\u06cc\u200c\u062f\u0647\u062f \u06a9\u0647 \u0628\u0641\u0647\u0645\u062f \u0686\u0631\u0627 \u062f\u0633\u062a\u06af\u0627\u0647 \u062a\u0623\u06cc\u06cc\u062f \u0634\u062f\u0647 \u0627\u0633\u062a\u060c \u0627\u0631\u0632\u0634\u0645\u0646\u062f\u062a\u0631 \u0627\u0632 \u06cc\u06a9 \u0628\u0631\u0686\u0633\u0628 \u201c\u0628\u0627\u0644\u0627\u200c\u0631\u062f\u0647\u201d \u0627\u0633\u062a.<\/p>\n\n\n\n\n\n\n\n\n
\u0645\u0631\u062d\u0644\u0647 \u067e\u0631\u0648\u0698\u0647<\/th>\n\u0633\u0648\u0627\u0644 \u0628\u0631\u0627\u06cc \u062e\u0627\u062a\u0645\u0647<\/th>\n\u0634\u0648\u0627\u0647\u062f \u0628\u0631\u0627\u06cc \u062d\u0641\u0638<\/th>\n<\/tr>\n<\/thead>\n
\u0637\u0631\u0627\u062d\u06cc<\/td>\n\u0686\u0647 \u0633\u0637\u062d\u06cc \u0627\u0632 \u0648\u0638\u06cc\u0641\u0647 \u0648 \u062e\u0637\u0627\u06cc \u0628\u0627\u06cc\u062f \u0645\u062d\u0627\u0641\u0638\u062a \u0634\u0648\u062f\u061f<\/td>\n\u0628\u0631\u0631\u0633\u06cc \u0628\u0631\u0646\u0627\u0645\u0647 \u0628\u0627\u0631\u06af\u0630\u0627\u0631\u06cc \u0648 \u062d\u0641\u0627\u0638\u062a<\/td>\n<\/tr>\n
\u062a\u062e\u0641\u06cc\u0641<\/td>\n\u0686\u0647 \u0645\u062f\u0644 \u0648 \u0644\u0648\u0627\u0632\u0645 \u062c\u0627\u0646\u0628\u06cc \u062f\u0642\u06cc\u0642\u0627\u064b \u0634\u0627\u0645\u0644 \u0645\u06cc \u0634\u0648\u0646\u062f\u061f<\/td>\n\u0648\u0631\u0642\u0686\u0647\u0654 \u067e\u06cc\u06a9\u0631\u0628\u0646\u062f\u06cc \u0648 \u0628\u0631\u06af\u0647\u0654 \u0627\u0637\u0644\u0627\u0639\u0627\u062a \u0628\u0627\u0632\u0646\u0648\u06cc\u0633\u06cc\u200c\u0646\u0634\u062f\u0647<\/td>\n<\/tr>\n
\u0645\u062c\u0644\u0633<\/td>\n\u0622\u06cc\u0627 \u062f\u0633\u062a\u06af\u0627\u0647 \u0628\u0627 \u062a\u0631\u062a\u06cc\u0628 \u0646\u0635\u0628 \u0628\u0631\u062f\u0647\u0627\u06cc \u062a\u0623\u06cc\u06cc\u062f \u0634\u062f\u0647 \u0633\u0627\u0632\u06af\u0627\u0631 \u0627\u0633\u062a\u061f<\/td>\n\u0631\u0634\u062a\u0647\u200c\u06a9\u0627\u0631\u0647\u0627\u06cc\u06cc\u060c \u0645\u062f\u0627\u0631\u06a9 \u0633\u06cc\u0645 \u06a9\u0634\u06cc \u0648 \u062b\u0628\u062a\u200c\u0647\u0627\u06cc \u0645\u0648\u0646\u062a\u0627\u0698<\/td>\n<\/tr>\n
\u067e\u0630\u06cc\u0631\u0647\u200c\u0646\u0648\u06cc\u0633\u06cc<\/td>\n\u0622\u06cc\u0627 \u062a\u0646\u0638\u06cc\u0645\u0627\u062a \u0648 \u0639\u0645\u0644\u06a9\u0631\u062f\u200c\u0647\u0627 \u0628\u0627 \u0637\u0631\u0627\u062d\u06cc \u062a\u0627\u06cc\u06cc\u062f\u0634\u062f\u0647 \u0645\u0637\u0627\u0628\u0642\u062a \u062f\u0627\u0631\u0646\u062f\u061f<\/td>\n\u0631\u06a9\u0648\u0631\u062f\u0647\u0627\u06cc\u06cc \u0627\u0632 \u062a\u0633\u062a\u060c \u0641\u0627\u06cc\u0644 \u062a\u0646\u0638\u06cc\u0645\u0627\u062a \u0648 \u0628\u0631\u0646\u0627\u0645\u0647 \u0632\u0645\u0627\u0646\u0628\u0646\u062f\u06cc \u0646\u0647\u0627\u06cc\u06cc<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u062d\u0641\u0627\u0638\u062a \u0627\u0632 \u0645\u0631\u0632\u0647\u0627\u06cc \u06a9\u062a\u0628\u06cc \u062f\u0631 \u0627\u0637\u0631\u0627\u0641 \u0647\u0631 \u0627\u062f\u0639\u0627 \u0636\u0631\u0648\u0631\u06cc \u0627\u0633\u062a. \u0627\u0633\u062a\u0627\u0646\u062f\u0627\u0631\u062f \u0645\u062d\u0635\u0648\u0644\u060c \u06af\u0648\u0627\u0647\u06cc \u0646\u0635\u0628 \u0646\u06cc\u0633\u062a\u061b \u0646\u0645\u0627\u06cc\u0634\u06af\u0631 \u0628\u0647 \u0637\u0648\u0631 \u062e\u0648\u062f\u06a9\u0627\u0631 \u06cc\u06a9 \u0633\u06cc\u0633\u062a\u0645 \u0627\u0631\u062a\u0628\u0627\u0637\u06cc \u0646\u06cc\u0633\u062a\u061b \u0627\u0645\u062a\u06cc\u0627\u0632 \u0648\u0644\u062a\u0627\u0698 AC\u060c \u0627\u0645\u062a\u06cc\u0627\u0632 \u0648\u0644\u062a\u0627\u0698 DC \u0646\u06cc\u0633\u062a\u061b \u0648 \u0635\u0641\u062d\u0647 \u062f\u0633\u062a\u0647\u0628\u0646\u062f\u06cc \u0639\u0631\u0636\u0647\u06a9\u0646\u0646\u062f\u0647\u060c \u062a\u0623\u06cc\u06cc\u062f \u062e\u0627\u0635 \u0628\u0631\u0627\u06cc \u06cc\u06a9 \u067e\u0631\u0648\u0698\u0647 \u0646\u06cc\u0633\u062a. \u062f\u0631 \u0635\u0648\u0631\u062a\u06cc \u06a9\u0647 \u0634\u0648\u0627\u0647\u062f \u0648\u062c\u0648\u062f \u0646\u062f\u0627\u0631\u062f\u060c \u0627\u06cc\u0646 \u0628\u06cc\u0627\u0646\u06cc\u0647 \u0631\u0627 \u0628\u0647 \u062f\u0631\u062e\u0648\u0627\u0633\u062a \u062f\u0631\u06cc\u0627\u0641\u062a \u06cc\u06a9 \u0633\u0646\u062f \u06cc\u0627 \u062a\u0623\u06cc\u06cc\u062f \u0641\u0646\u06cc \u062a\u0628\u062f\u06cc\u0644 \u06a9\u0646\u06cc\u062f. \u0627\u06cc\u0646 \u0639\u0627\u062f\u062a \u0628\u0627\u0639\u062b \u0645\u06cc\u200c\u0634\u0648\u062f \u06a9\u0647 \u062a\u0623\u0645\u06cc\u0646 \u0648 \u062a\u0623\u06cc\u06cc\u062f \u0633\u0631\u06cc\u0639\u200c\u062a\u0631 \u0627\u0646\u062c\u0627\u0645 \u0634\u0648\u062f\u060c \u0632\u06cc\u0631\u0627 \u0645\u0648\u0627\u0631\u062f \u0628\u06cc\u200c\u062c\u0648\u0627\u0628 \u067e\u06cc\u0634 \u0627\u0632 \u062b\u0628\u062a \u0633\u0641\u0627\u0631\u0634 \u062e\u0631\u06cc\u062f \u0642\u0627\u0628\u0644 \u0645\u0634\u0627\u0647\u062f\u0647 \u0647\u0633\u062a\u0646\u062f.<\/p>\n

\u0633\u0648\u0627\u0644\u0627\u062a \u0645\u062a\u062f\u0627\u0648\u0644<\/h2>\n

Does an LCD make an MCCB smart enough to prevent every fault?<\/h3>\n

No. A display is an interface to specified information and settings. Correct rating, installation and protection coordination remain necessary.<\/p>\n

Does an LCD imply Modbus communication?<\/h3>\n

No. Confirm the communication interface separately. Even a Modbus option needs its register map and supported functions.<\/p>\n

Is a displayed value suitable for billing?<\/h3>\n

Not without an appropriate declared measurement and approval scope. A local indication should not be assumed to be revenue-grade metering.<\/p>\n

What happens to the display if its supply fails?<\/h3>\n

Behaviour is model-specific. Obtain the power requirements and confirm which protection and display functions remain available.<\/p>\n

\u0645\u0646\u0627\u0628\u0639 \u0648 \u06af\u0627\u0645 \u0628\u0639\u062f\u06cc<\/h2>\n